Die-head.



V. R. KOONTZ.

3 DIE HEAD. APPLICATION FILED DEC- l2, 19H.

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V. R. KOONTZ.

. DIE HEAD.

APPLlCATlON FILED DEC. 12, I914 1,212,508. a Patented Jan.16,1917.

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v. R. KOONTZ.

DIE HEAD.

APPLICATION FILED 05c. 12, I914.

Patented Jan. 16,1917.

3 SHEETSSHEET 3.

VICTOR :a. KOONTZ, or wayNnsnono, PENNSYLVANIA.

DIE-HEAD.

Specification of Letters Patent.

Patented J an. 16, 1917..

Application filed December 12, 1914. Serial No. 876,963.

mary object thereof is the provislon of a construction of the kind mentioned, which has great facility of adjustment and operation under a wide range of working conditions. r

A further object of my invention is the provision of a die head in which the size of he die can be adjusted while the die head is in motion, whereby the workman can change quickly from one size of stock to another, without being first required to shut off the power and stop the machine.

A still further object of my invention is the provision of a die head by which chasers or cutters are so supported that they can be simultaneously oscillated to open or close the die, regardless of whether the die head is stationary or in motion, and in which the chasers or cutters can also be independently adjusted to the required extent.

The above and other objects of my invention are set forth in the following specification taken in connection with the accompanying drawings, which illustrate a preferred embodiment of my invention, the same characters of reference being used to indicate the same parts in all views.

On said drawings Figure 1 is a side elevati on of my improved die head, partly in section, showing the same mouthed in operative position. Fig. 2 is a front elevation of the same, partly in section. Fig. 3 is a side elevation, partly in section, of one of the carriers by which the chasers or cutters are mounted in the die head. Fig. 4 is a section on the line 4-4l in Fig. 3. Fig. 5 is a section on the line 55 in Fig. 3. Fig. 6 is a side elevation of a modified form of carrier. Fig. 7 is an end elevation of the construction shown in Fig. 6.

In the particular description of my in vention, as shown in the drawings, I employ the numeral 1 to indicate the body of the die which is adapted to be secured to a suitable member for rotating the same, such as shaft 2. This shaft is supported in one or more suitable bearings indicated at 3 on the framework 4: of the machine of which my die head forms part, and the die head will have a central bore 5 which receives the stock upon which the die head operates. The body 1 supports a suitable number of carriers 6 for the cutters or chasers, these carriers being shown as four in number, but obviously I may use as many or as few as desired. Each of said carriers 6 is shaped to support a chaser in its outer end and it comprises an extension 7, adapted to be joined to a cylindrical section 8, which constitutes the inner end of the carrier and is adapted tobe inserted into a cylindrical bore 9 in the body 1. These bores extend from the front end of the body parallel to the axis of the shaft 2, almost to the rear end of the body 1, and they are, of course, equidistant from the center of the bore 5. The chasers or cutters are indicated at 10, and as shown on the drawings, they comprise triangular, longitudinally extending, parallelthreads, terminating in sharp points at the beveledworking ends of the chasers or cutters adjacent center of the body 1. These chasers are located so that they are substantially tangential with respect to the stock which is to be worked, as will be readily understood, and I provide for the simultaneous adjustment of the carriers 6 in their respective bores 9 so that the size of the die can be changed or the die opened and closed, regardless of whether the body 1 is in motion or at rest, and at the same time, mount the chasers 10 so that they can be independently adjusted in a manner that I shall now fully set forth.

The extension 7 of each carrier 6 has a circumferential groove 11 to receive a ball 12. The balls 12 are held in their places by means of screws 13,- which are set in threaded apertures 14, extending into the body 1 from the circumference thereof, these threaded bores 13 being of course thesame in number as the carriers 6. The inner ends of the screws 13 will have hemispherical sockets to receive the balls 12, and the grooves 11 will of course correspond in shape to the balls, so that, when the carriers are inserted into the bores, and the screws 13 with the balls 12 at their inner ends turned up, the carriers will be firmly locked in the body 1 and held against longitudinal movement, but, at the same time, will be free to rotate when actuated in the necessary manner. In order to actuate the carriers, I provide devices which encircle the body 1 and engage all of the carriers 6, so that when the devices in question are operated, the carriers are turned simultaneously in the bores 9 through equal degrees ofarc.

For the purpose of mounting the actuating devices above mentioned, as required to: produce the desired result, I provide the body 1 with'a number of slots 15 in its circumferential surface. These slots are the same in number as the bores 9, and are so placed as to constitute openings of these bores through the sides of the 'body,'being so located that they open into the bores 9 through the portions which are farthest from the central bore 5. Thebores 15 are better shown in Figs. 1 and 2, and I'encir cle the body"with a ring=16 having internal projections 17 which pass into "the slots '15 and have threaded openings "to rece'ive screws 18 similar to the; screws .13. 'The screws '18 have hemispherical sockets at their inner ends 'to' accommodate b'alls 19, and each-ball 19 will fitintoa'spiral groove 20" on the outer'sur'face of the section 8 of each carrier; The inner' ends of the screws 1'8' and projections 17'wi11 conform as nearly as possible to thecurvature of thebore'9,,and' it will be obvious that while the ring 16 must rotatewith the body 1, the movement of the' ringonthe body 1 in-an axial direction will oscillate the carriers in the 'bo'res 9 in "one direction or the other. For example, if I move'the'ring 17 to'the left, referring to Fig. 1", the carriers 6 will be'rotated in a clockwise direction so as to shift the points of the chasers 10' away from the center of thebody l andopen the die'; while, on the other hand,'if "I move the ring 16to the" right, the carriers will oscillateanticlock- Wise, and thedie will be closed.

Inorder to'effect this sliding'of the ring backand' forth on the outside of thefbody 1, I inclose the ring 16 in a ring 21, whichhas atone end a flange 22, against which the ring 16 abuts. The'opposite end of the ring 22 is internally threaded to receive an an nular locking nut 28. The ring 21am not rotate with the ring 16, and there will be suflicie'nt space between the flange'22 and the nut 23 to allow the ring 16' free" rotatory movement. On the outside of the ring '21 are threads 24; which are engaged by another ring 25. The ring 21 is adjustable in the ring 25, and it willfln'ow be obvious that if the ring25 is held stationary, the rota tion of the ring 2l,beca'use of the screw' threads thereon, engaged by-the ring 25, will cause the'ring 16 to be shifted toward the back or front of the body lwi'thoufiin any way interrupting or 'interferingwith the rotation of the ring-1 6. Of course, 'the"' inside of the ring 21, eXceptfor thethreads for the'nut 28 and'the insideof the nut 23 is smooth, and notonly'the'riiig'16, but the body 1 also, can rotate therein freely.

- position.

To support the rings 21 and 25, I provide trunnions 26 on opposite sides of the ring 25,

to be received in suitable bearers at the upper ends of pivoted curved arms 27. Each of these arms 27 has a journal or trunnion 28 so that it may be mounted in a suitable bearing on the frame 1. The bearings for the trunnion 28, as shown in Fig. 2, will be in 'a'linement and the arms 27 will have extensions 29 which can be bolted or otherwise secured togetheri"*Th'ese'a'rms 27,.Wltl1 theirextensions 29,will beso shaped that when the extensions are bolted together, the arms andjthe eXtensions will make a'yoke, oscillatably. mounted on the frame 4: and 0s cillatablysupporting the ring 25 andring 21 by virtue of the bearing engagementof' the arms 271 nions 26,

Theext'ensions 29 have alined openings 30, through which passes a spindle 31. [These openings are "elongated horizontally, and below the spindle 31 are alined openings '32, which are elongated vertically torecei've the pin33' of a crank 34, and which isrigidly mounted upon "'tlie-spindle31. 'The spindle 31 also has rigidly secured thereto atone end thereof'a lever 35, and'it will now'be seen that when the lever 35 ismo ved backfand forth, the crank will shift'the'lower, end of the yoke and thus move the rings 25, 21' and 16 back' and forth withrespect tothe body 1.

The utility of as' much orm construction as I have described'willnow be ex lained. The die can be" opened by moving t iele'ver 35 to the left, referring to F ig'. 1, whereby.

the yoke wil'l shift the 'ring 25.' to the left also oscillating the carriers 6 simultaneously in aclockwise direction: to throw the points of the Chasers from the center of the body 1. To close the die b'ylmoving the' points of .thejchfl'sel's b a d, the. coi -i. ter',"t1 1 e"lever is pulled to'the right, wh n the r ng 21 is in such p i i n with c to the ring 25, that tlie' inoveinent of the lever 35 to'the right as far as it will go will cause theballs 19 to be' located at the ends of the groo ves 20, which" are "nearest to the grooves 11', the size of the die"will"befas small as it can be made wh en thechaSers are in any: given position. Tomakefthe die" largenthe ring 21 i'srota t ed in jthefring E so as move the ring f2l'and thefrin tothe;left,,referring to "Fig. 1. This rotation' of'the ring' 2 l may be' effected by a suit able tool sucli a's a saanner en a 'in fholesj f in the flange 22 of th e iingj2l, or in any other convenient way, and similar holes will of course be made in the nut 23 so that it can be screwed in or out", The further the,

ring 21 is turned so as to slide to the left, referring to 'Figfi1., theifurther will the balls 19 befrom the innerends of the grooves 20 when the lever 35 is" locked in right hand Hence, the amount. of counter}:

clockwise rotation of the carrier 6 can be less and less with the result that the points of the chasers will come to a stop at greater and greater distances from the center of the body and the size of the die thus increased. Manipulation in the opposite way will of course make the die smaller. The holes in flange 23 are not shown, but may be placed as needed.

A suitable spring 36 is connected to the lever 35 and the frame 4 in such a way as to tend normally to draw the lever 35 to the left, referring to Fig. 1, and open the die; and I lock the lever so as to hold the die closed against the force of the spring 36 by means of a dog 37, pivoted to the lever, and having a projection 38 which drops into a notch 39 on the frame 4. On the lever 35 being pulled over to the right, this dog will drop into the recess as soon as the carriers have moved the chasers or cutters inward as far as the carriers can be actuated by the balls 19. To release the lever and open the die, 1 pro ide av reciprocable rod 40, mounted in suitable hearings on the framework 4, and having a collar 41 provided with a projection having a forward beveled edge. As shown in Fig. 1, the beveled end of this projection will engage the forward beveled end of the dog 37 to lift the same out of the recess 39 when the rod 40 is moved to the left. An adjustable stop 42 may also be mounted on this rod, if desired. A handle or lever, not shown, connected with the rod 40 may be utilized to operate the same.

In order to be enabled to control further the size of the die and chasers 10, I make the chasers independently adjustable in the carriers 6, while at the same time retaining the advantages and benefits of being able to oscillate the carriers 6 to a greater or less extent, as detailed in the foregoing paragraphs. Each of the carriers 6 has a groove 43 in its outer end, extending across the same from the circumferential edge of the body 41 toward the bore 5, the bores 43 being so arranged that when the carriers 6 are holding the chasers in working or closed position, the longitudinal axis of these grooves will not extend toward the exact center or axis of the die head, but will extend to one side of the same, that is, in a tangential direction with respect to the bore 5. In each of the grooves 43 is fitted a chaser block 44, and these chaser blocks will be secured to the carriers by means of threaded holes 45 in carrier 6 to receive locking screws 46. The chaser blocks 44 will also have longitudinal grooves 47 to receive the chasers or cutters 10. At their outer ends, the walls of the screws 47 will have interrupted threads 48 to receive adjusting screws 49; these screws serving to push the cutters ahead of them. Further, on each side of the groove 47, the chaser blocks 44 will be provided with recesses 50, and in these recesses will be located locking blocks 51, held by screws and each locking block 51 will have a projection 53 to engage the top of the adjacent cutter, and by pressure upon the same, hold it against displacement. There will be two recesses for each block 44, but only one block 51 and screw 52. This block will always be located in the recess which is on the same side of the groove 47 as the longitudinal threads of the chaser in the block 44, and when the chaser is reversed, the locking block and screw will of course be placed in the opposite recess 50.

As shown in Fig. 3, the bottoms of the grooves 47 in the chaser blocks 44 will be inclined. The bottoms of the grooves 43 in the carriers 6 will be at right angles to the axis of oscillation of the carriers. Hence, the chasers will not be at right angles to the axis of the body 1, but will be inclined thereto at the angle required to cut threads of the desired pitch on the stock when the body 1 is in motion. The locking blocks 51 will be at the inner ends of the chaser blocks, referring to the positions which the parts occupy when the chaser blocks are mounted on the outer ends of the carriers in the head 1, and they are of course replaceable at will, according to the character and conditions of work, in order to adjust the chasers 10 in the grooves 47, the locking blocks are loosened and the chasers 1O moved in or out, far as the screws 49 will permit. The screws 52 are then tightened and each chaser will be securely held in whatever position is given it.

The function, mode of operation and utility of my invention and all its'parts can now be readily understood. First, the chasers 10 are individually adjusted and locked in position and then the body 1 can be set into rotation. The inner ends of the chasers 1O engage the stock and cut the same, and the die can be opened or closed at will by manipulating the lever 35 without stopping the rotation of the body 1. Also the size of the die can be changed within the limits determined by the positions of the inner pointed ends of the chasers 10 by manipulating the ring 21 in the manner already outlined, and the opening and closing of the die, as well as the adjusting of the size thereof, can be done, whether the body 1 is in motion or at rest. Hence, the die can be made to work upon successive pieces of stock of the same or different sizes, without shutting down the machine. I provide for holding the ring 21 in adjusted position in the ring 25 by providing ring 25 with a slot 54, extending over a certain length of arc and the ring 25 is provided with a screw threaded opening in the slotted portion to receive a locking screw 55. In order to adjust: the ring 21, whether the body 1 is rotating or not, the locking screw 55 is turned back, easing the engagement between the threads on the inside of the ring -25 and the threads 2eL- After the ring 21 is rotated, the locking .screw 55 is then into the sections 8 in a chordal direction.-

This engagement will hold the parts composing. the carriers 6 together against any possibility of their becoming loose in operation.

The above construction is intended to op erate by causing the body 1 to rotate in a counterclockwise or left handed direction, referring toFig.'2. In order to adapt my invention. so that it canbe made to operate with the body 1 rotating in either direction, I simply provide twospiral grooves 20 on the section'S of the carrier, as shown in Fig. 6. To change fromiright hand work to left hand' work then, or vice versa, I turn out the screws 46 so that the chaser blocks 4: 1 can be pulled backward. I next loosen the locking blocks 51 and the screws 52 so that these locking blocks can be shifted into the recesses. 50 -on: the opposite. sides of "the groovest7. The chaser 10 can thus 'be' reversed, andz-by turningback the screws 13 and 18,: the .carrier Jc'anbe pulled out so as tOaGIIZIblQ-tllB workman .to:place the othergrooves 20 ofeachcarrier into operative relation with the balls 19. This change 'can be madein .a very short=time, and eliminates the use or the necessity ofdifierent chaser blocks and carriers for right and left hand Work.

It will be seen with reference'to Fig. .2 that the operation of-r emoving the carriers from the bores 9 while the lever 35 and ring 16 are heldfastwill cause these carriers to oscillate as they are pulled out, in the same direction as when the lever 35is moved to open the .die. -Hence, the advisability of first withdrawing: the chaser blocks 14, in

order to preventthe ends of the chasers from binding against an adjacent carrier. I may cutaway POItlOIlSOf the carriers 6 adjacent the inner ends of the grooves 43,-

as shown at 60, so as to give suflicient clearance to the Working ends of thechasers 10,

When'the carriers areoscillated in the bores '9 toopen the die. or close it. Of course, to

reverse working, body 1 mustbe stopped in order to allow the carriers6 to be shifted,

as just described.

In Figs. 6 and 7,. I show a modified forin of chaser carrierwhich is the same in some parts as the carrier or holder shown 'in my Patent No. 1,080,565, granted to me on De-" cember' 9, 1913. In this form, the section 8 is the same as the section 8 in the form already described, and is joined to thesection 7 in the sameway, and the groove 11 may extend all around the extension 7 or only half around this extension, as actually illustrated. The portion beyond the extension or section 7, forming'the outer end of the carrier, is in the form of a transversely extending projection having one end flush with the end of the extension'7 and the other end located beyond the opposite edge of this extension. I have indicated the projection in question by the numeral 6, in Figs. 6 and 7. To the sideof this projection, I secure a swivel plate 61', which isheld pivotally in place by means of the bolt 62, and one face of this swivel plate, that is, the face turned away from the projection 6, will have transverse teeth thereon to engage similar teeth in one side of the chaser or cutter 10. The t 7 rear end of the chaser is held down by the block 63, which has an overhanging portion through whichare passed one or more screws 64 to'engage the outer face of the chaser 10. The block63 is also provided with screw threaded openings to receive a pair of adjusting screws 65, which engage the end of the chaser toadjust the same in a longitudinal direction. It will be apparent thatif the screws 64 are loosened and the screws 65 then turned up,that the chaser 10 can be forced to the right, referring to Fig. 7.

As above stated, the swivel plate 61 is pivoted on'the bolt 62. Adjacent the opposite end of this plate is a bolt 66, which passes through the block63, the plate 61 and the projection 6 together, and I may make the bore of this bolt through the projection 6 of enlarged dimensions,"so as to permit some play of the bolt therein, and thereby allow'the plate 61 and the chaser to be swung about the pivot bolt 62 a certain degree. set for'the required pitch on the stock or adjusted so that its length makes any de sired angle with the direction of the axis of thecarrier 6. As indicated in Fig. 7, the face of the block 63 which engagesthe plate 61 is provided with teeth to engage the teeth thereon, the same as the'chaser 10; and the bolt 66 serves to hold the block 63 and plate 61 together so as to secure the chaser 10 while at the same time permitting movement of the plate around the bolt 62. This form of carrier or holder affords Various adjustments of the chaser with respect to the axis In this way, the chaser 10 can be 'adapted for threads on a bolt or screw,

of oscillation of the holder, and is superior to the form of holder shown in Fig. 3, in which the inclination of the chaser with respect to the axis of the carrier is fixed according to the slope of the bottom of the groove d7.

To the ting the side of the projection 6, lug 67, which may project into an elongated opening into the projection 6. This projection also carries an adjusting screw 68. extending at right angles to the projection 67 and having shoulders to engage the end thereof. By turning the adjusting screw, it will be apparent that the adjacent end of the swivel plate 61 may be moved in either direction on the pivot bolt 62 and the bolt 66 may be loosened before adjusting and tightened afterward to keep all the parts in rigid relation. Gage marks 69 may be placed on the adjacent edges of the projection 6, and swivel plate 61, as shown in Fig. 6, to indicate the degree of adjustment made.

This form of holder or carrier is of course adapted to be used with the body land the other elements of my invention the same as the form shown in Fig. 3. It is just as well face of the swivel plate 61, abut- I secure a the additional advantage for use in cutting and of being adaptable to different pitches of thread. Of course, the form of carrier shown in Fig. 3 will have two threads and two grooves 20 thereon, extending in opposite directions so as to be adapted for both right and left hand work, the same as the form of carrier shown in Fig. 6.

The above disclosure is illustrative only, and it is obvious that many changes in the details can be adopted to secure the same advantages and results without departing from the nature of my invention 1 therefore wish to reserve to myself the right to make such changes in the shape, size or arrangement of the various parts as fairly fall with in the scope and spirit of the claims appended hereto.

Having described my invention, what I believe to be new and desire to secure by Letters Patent of the United States is:

1. The combination of a movable body, means for carrying one or more chasers supported by the body, said body and said carrying means being shaped to engage each other interchangeably for operation in opposite directions, whereby the same carrying means can be employed, regardless of the direction of operation of the body.

2. In a construction of the kind described, a chaser carrier having means for receiving and holding a chaser, and a cylindrical section having a pair of spiral grooves extending in opposite directions in its circumferential surface.

3. The combination of a body having a all kinds of work and affords bore, a chaser carrier having means for receiving and holding a chaser, and a cylindrical portion to be received in said bore, said portion being detachable, means for securing the said portion to the carrier and means for locking the securing means.

In a construction of the kind described, the combination of a chaser block having a longitudinal groove therein, said groove having an inclined bottom, a chaser in said groove, the opposite walls of said groove having interrupted threads thereon, an adjusting screw engaging said threads, said block having recesses on either side of said groove, a locking block to fit into either recess to engage the chaser and means for securing said block to the chaser block.

5. In a construction of the kind described, a chaser carrier having a transverse projection at one end, a swivel plate, means for pivotally securing the swivel plate to one side of the projection, said swivel plate having transversely extending teeth, a chaser having teeth on one side to engage the teeth of the swivel plate, means for adjustably securing the chaser to the swivel plate, and means carried by the projection for adjust ing the swivel plate around the means for pivotally securing the plate to the projection.

6. The combination of a rotatable body having a central opening, and having a plurality of bores extending parallel with said opening and arranged at equal intervals around the same, a chaser carrier, oscillatably mounted in each of said last named bores, said body having longitudinal slots in its circumferential face, forming lateral openings leading to said bores, a ring encircling the body and having projections extending into said slots, said projections carrying means for engaging and oscillating the chaser carriers, a ring receiving the first ring and permitting the first ring to rotate therein, a third ring encircling the last named ring and having threaded engagement therewith, said last named ring having a pair of trunnions, a pivotally mounted yoke receiving said trunnions, and connections for operating said yoke.

7. The combination of a rotatable body slots, means carried by the projections to oscillate said carriers, a second ring receiving the first ring and permitting the first ring to rotate therein, said second ring having exterior threads thereon,

a third ringengaging said threads and having a slotted portion, a locking screw carried by said slotted portion to secure the second and thirdrings rigidly together, said third ring having a pair of trunnions, a pivoted yoke for engaging said trunnions and connections for actuating the yoke.

8. The combination of a rotatable body having a. central aperture, bores extending parallel to said aperture, and .spaced equidistant around the same, a, chaser carrier oseillatably mounted in each bore of said body, said bodyhaving axially extending slots in its circumferential surface forming openings leadingto said bores, a ring encircling the body and rotatable therewith, said ring having projections engaging the slots, means; carried by the projections to oscillate said carriers, a second ringreceiving thefirst ring and permitting the first ring to rotate therein, said second ring havingeXterior threads thereon, a third ring engaging saidthreads and havinga slotted portion, a locking screw carried by said slotted portion to secure the second and third rings rigidly together, said third ring having a pair of trunnions, a'pivoted yoke for engaging said trunnions and connections for actuating the yoke, said connections comprising a lever, a locking dog therefor, and movable means comprising an element having a beveled end to engage the dog and release the lever.

9. The combination of a die head,-one or more chaser carriers mounted therein, means encircling said die head, and engaging said carriers to adjust the same, means encircling the first means and rotatable with respect thereto to operate the first n1eans,and an element encircling said last named means to vactuate the same, said element and said last named means being adjustable axially of the die head with respect to each other.

Intestimony whereof, I havevsigned my nameto this specification in the presence of two subscribing Witnesses, this nineteenth day of November, 1914.

VICTOR R. KooNTZ.

Witnesses -WATSON R; DANsoN, JosEi HINE ,ROLLMAN.

Copies ottliis patent may be obtainedior five .cents sa a addressing the fcommissioner 012mm,

Washington, D. C. 

